Nine people were arrested as thousands gathered at the prehistoric stone circle in Stonehenge to mark the longest day of the year, British police said Sunday. Around 23,000 people, some with flowers in their hair and playing drums and accordions, showed up at the site in Wiltshire, southwest England to see the sun rise at 4:52am (0352 GMT). The main stones at Stonehenge, a World Heritage Site, are thought to have been erected in around 2500 BC. Thousands of people including modern-day druids flock to the site every year to celebrate the solstice, which is also the official start of summer. The sun rises in alignment with some of the main stones at the monument and experts believe that Stonehenge was built as a prehistoric temple. Attendance was down on the 36,000 who went to Stonehenge for last year’s summer solstice. Superintendent

Read More: Thousands mark summer solstice at Britain’s Stonehenge; Attendance down from last year